For all who struggled as well:
Clickable Custom Boxes (or Icon Box Gradient etc.) are possible with the code above.
Just be sure you get the correct quotation marks in the jQuery-snippet. Copy&Paste will not work.

It is definitely the quotation marks. When coding there are different quotation marks that don’t translate from text to code editors. If you look closely the quotation marks around “make it clickable” are straight up and down but the link quotes are at an angle. That is your problem. Manually change out the quotes but just typing them directly into the editor.

Here is what it should look like. Notice the link is yellow, not green and dark blue.

Objective:
The whole custom box should be clickable.
Things to consider:
I will be using button inside the box to add a link and JavaScript to make that link clickable for the whole custom box.
Implementation:
Add a custom box using the WPBakery Page Builder. Please checkout this link to add a custom box element/shortcode https://themes.artbees.net/docs/custom-box-shortcode/
Add whatever content you want to add to the box.
After that, to add a link we will add a button element/short…